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14.2 Specific heat capacity and latent heat

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Question 49
H

A heater transfers energy to 0.50 kg of a solid at a net rate of 80 W. The solid starts 20 ∘C20\ ^\circ\mathrm{C}20 ∘C below its melting point. Its specific heat capacity is 800 J kg−1 ∘C−1800\ \mathrm{J\,kg^{-1}\,{}^\circ C^{-1}}800 Jkg−1∘C−1 and its specific latent heat of fusion is 64000 J/kg. How long does it take to melt completely?

[1]
A

100 s100\ \mathrm{s}100 s

B

300 s300\ \mathrm{s}300 s

C

500 s500\ \mathrm{s}500 s

D

400 s400\ \mathrm{s}400 s

Markscheme

14.2 Specific heat capacity and latent heat Questions

  1. GCSE
  2. /Physics
  3. /14.2 Specific heat capacity and latent heat

110 exam-style questions on Edexcel GCSE Physics 14.2 Specific heat capacity and latent heat, covering 14.2.1 Heating, temperature and changes of state, 14.2.2 Specific heat capacity and specific latent heat, 14.2.3 Specific heat capacity calculation, 14.2.4 Specific latent heat calculation, and 14.2.5 Reducing energy transfer through thermal insulation. Each one has a worked solution and a mark scheme showing where the marks go.

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